Investors who may have been hoping the Federal Reserve is poised to come to the aid of tariff-rattled markets took away an unwelcome message from the central bank’s chief on Wednesday: the Fed may be in a bind. Fed Chair Jerome Powell said the central bank would wait for more data on the economy’s direction before changing interest rates. Speaking to the Economic Club of Chicago, he noted that there was a potentially tough situation developing for the Fed in which inflation is pushed higher by tariffs while growth and potentially, employment, weaken. Investors fear continued elevated inflation will hamstring…